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117 results for “Trace elements”
Differential effects of tree species identity on rhizospheric bacterial and fungal community richness and composition across multiple trace element-contaminated sites
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Supplementary information from: A systematic review of trace elements in the tissues of bats (Chiroptera)
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ShellTrace v2.0 - Bivalve growth and trace element model
<p>This file contains the R-script used to model growth and trace element uptake in bivalve shells, as described in the equally named Geoscientific Model Development publication (de Winter et al., 2017), including a copy of the manuscript preprint.</p>
Femtosecond-LA-ICP-MS analysis recording variation in trace elements in Amphistegina lessonii from Akajima, Okinawa Prefecture, Japan
<p>The data set comprises of sea surface temperatures, salinity which were recorded from Akajima Island, Okinawa Prefecture, Japan during the year 2003 and 2004. The tidal heights data was generated using the software Tide Predictor for the Akajima Island. The Element/Ca analysis of larger benthic foraminifera <em>Amphistegina lessonii</em> was carried out by using Femto-second Laser Ablation Inductively Coupled Plasma-Mass Spectrometer (fs-LA-ICP-MS) technique at the Department of Climate Geochemistry, Max Planck Institute for Chemistry. The co-variation and correlation plots of Element/Ca with tidal heights, sea surface temperature and sea surface salinity are also provided.</p>
Gas phase acid, ammonia and aerosol ionic and trace element concentrations at Cape Verde during the Reactive Halogens in the Marine Boundary Layer (RHaMBLe) 2007 intensive sampling period
<p>The data files are in NASA Ames Format.</p> <p>A full description of the data set has been published in the journal<br> Earth System Science Data at http://www.earth-syst-sci-data.net/5/385.</p> <p> </p>
Trace and rare-earth element composition of 2480 Ma detrital zircons in Proterozoic metapsammites from northwestern Arizona
<p>Detrital zircon grains in the ~1740-1750 Ma Vishnu Schist and similar rock units in northwestern Arizona consist of up to 30% grains dated by U-Pb isotopic analysis at 2470-2490 Ma. These zircon grains are distributed over ~40,000 km<sup>2 </sup>and define an age peak at 2480.0 ± 27.3 Ma (2SE). These grains have yielded unusually consistent <sup>207</sup>Pb/<sup>206</sup>Pb dates, with generally smaller analytical uncertainty and greater concordance to ideal U-Pb evolution than grains of other ages. A weighted mean age of 2480 ± 0.9 Ma (2SE) for this zircon population reflects consistent analytical results and high analytical precision but not the accuracy of the age. The source of these zircons has not been identified. To better characterize the unidentified source, we analyzed 45 of these grains for trace and rare-earth elements by laser-ablation mass spectrometry and scanned 16 grains with an electron microprobe to identify mineral inclusions. Mass spectrometer determinations of Sc/Yb and Nb/Sc support derivation from an oceanic-island igneous source. Electron microprobe scans revealed quartz in 5 of 16 grains, indicating a felsic source. The low variability in <sup>207</sup>Pb/<sup>206</sup>Pb dates and a generally linear relationship between U and Th support zircon derivation from a single igneous unit or closely related set of units without xenocrystic zircons. A literature search for other zircon populations with similar age and U/Th ratios identified ~2480 Ma zircons in a Mesoproterozoic(?) metapsammite and conglomerate in southwestern Montana. This sandstone was deposited near the margin of the Wyoming craton and contains almost entirely 2400-3600 Ma zircons, unlike zircon grains in Vishnu Schist which include a large population of 1730-1900 Ma zircons. From this relationship, we infer that the 2480 Ma zircons in both areas were derived from a source in the Wyoming craton. We conclude that the 2480 Ma Vishnu zircons were derived from a felsic batholith that formed above and from hotspot magma related to the ~2450-2480 Ma Matachewan Large Igneous Province, that this batholith formed by mixing between a mantle-derived hotspot magma and assimilated Archean continental crust, and that the source rock was emplaced during initial rifting between the Wyoming craton and the Superior province.</p>
Exploring the preservation of a parasitic trace in decapod crustaceans using finite elements analysis
<p>The fossil record of parasitism is poorly understood, due largely to the scarcity of strong fossil evidence of parasites. Understanding the dynamics of preservation for fossil parasitic evidence is critical to contextualizing the fossil record of parasitism. Here, we present the first use of X-ray computed tomography (CT) scanning and finite elements analysis (FEA) to analyze the impact of a parasite-induced fossil trace on host preservation. Seven fossil and modern decapod crustacean specimens with branchial swellings attributed to an epicaridean isopod parasite were CT scanned and examined with FEA to assess differences in the magnitude and distribution of stress between normal and swollen branchial chambers. The results of the FEA show highly localized stress peaks in reaction to point forces, with higher peak stress on the swollen branchial chamber for all specimens, suggesting a possible shape-related decrease in the preservation potential of these parasitic swellings. Broader application of these methods as well as advances in the application of 3D data analysis in paleontology are critical to understanding the fossil record of parasitism and other poorly represented fossil groups.</p>
Dataset for: Combined Ca, Sr isotope and trace element analyses of Late Cretaceous dinosaur teeth: assessing diet versus diagenesis
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Nutrients, alkalinity (AT), dissolved inorganic carbon (CT) and trace elements in Kongsfjorden, Svalbard July 2020
<p>Original data set for <strong>‘‘The Influence of Glaciers on Biogeochemical Cycles of Carbon, Nutrients and Trace Elements in Arctic Fjord Systems‘‘ </strong>contributing to <span>European Union’s Horizon 2020 research and innovation program under Grant Agreement No. 86938. </span> </p> <p>Data includes basic information (sample name, date, coordinates, depth), primary water column parameters (salinity, temperature, turbidity), dissolved (<22 µm) trace elements (dAl, dV, dFe, dMn, dCo, dNi, dCu, dZn, dCd, dPb), dissolved (<22 µm) nutrients (nitrate, nitrite, silicate, phosphate) and carbonate system parameters (alkalinity and dissolved inorganic carbon) for each sample.</p> <p> </p>
Trace element and sulfur isotope study of sulfide chimneys from the basalt-hosted Daxi Vent Field: implications on the genesis of seafloor massive sulfide deposit at a segment end
<p>The dataset file is Table S1-S6 in the supporting information of the article entitled "Trace element and sulfur isotope study of sulfide chimneys from the basalt-hosted Daxi Vent Field: implications on the genesis of seafloor massive sulfide deposit at a segment end".</p>
Data Sets for: Trace elements in aerosol from Northwest Pacific marginal sea, Indian Ocean and South Pacific to Antarctica: Spatial variability and source identification
<p>This dataset includes the concentrations of trace elements in aerosols, along with location and time information, collected during a cruise from November 2021 to April 2022. The cruise covered the Pacific, the Indian Ocean, the Southern Ocean.</p>
Tracing the oxidizing state and element-mobilizing fluids in continental subduction zones:Insights from the granitic melt-eclogite interface
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Can volcanic trace elements facilitate Covid-19 diffusion? A hypothesis stemming from the Mount Etna area, Sicily
<p>In December 2019, severe cases of pneumonia of unknown aetiology were reported in Wuhan city, in China. Lately, the pneumonia was related to the severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2), and the diseases was termed coronavirus disease-2019 (COVID-19). At the end of January 2020, the infection spread all over Italy, but with high infection rates and mortality in the northern part, especially in Lombardy, the most industrialized and polluted region of the country. It is noteworthy that a strong association between severe viral respiratory disease and air pollution has been described. Air pollutant could be solid particles, liquid droplets, or gases and can be of natural origin (such as ash from a volcanic eruption) or released from motor vehicle depletes (carbon monoxide gas) or factories (sulfur dioxide). Volcanic eruptions release large amounts of sulphuric acid, hydrogen sulfide, and hydrochloric acid into the atmosphere. Pulmunary diseases spreadby means of small droplets in thebreath, also called aerosols, and air pollution may facilitate the outside survival of viruses. We suppose that ash and gases emitted from the Mount Etna contributed to air pollution, potentially favouring the major contagion of COVID-19 in the eastern flank of the mountain, as in Catania city. In fact, ash and gases (with regard to radon) are usually particularly intense in winter, with a reduction of emission of specific metals with warmer weather. This is the first paper that elaborates the hypothesis of a potential role of volcanic gases and heavy metals-related air pollution, combined to specific climatic conditions and regional topography, in favouring severe COVID-19 diffusion in Sicily. Clinical and epidemiological studies are needed to support the hypothesis and plan the due prevention and awareness-raising campaigns.</p>
Apatite trace element data for genetic type classification
<p>Apatite trace element data for genetic type classification, including porphyry, skarn, orogenic Au, iron-oxide copper gold (IOCG), and iron-oxide apatite (IOA or Kiruna type).</p>
Laser Ablation Inductively Coupled Plasma Mass Spectrometric Quantification of Isotope Trace Elements in Human Carcinoma Tissue - Stochastic Dynamics and Theoretical Analysis (SUPPORTING INFORMATION)
<p>Supporting information file of publication [https://papers.ssrn.com/sol3/papers.cfm?abstract_id=4334866]. </p>
Data for the Journal article "Reduced whereas still noteworthy atmospheric pollution of trace elements in China"
<p>This dataset provides the trace elements emission inventory with 27km resolution for China in 2017, the model simulated concentrations of trace elements for China in 2017 and the associated health risks of trace elements for China in 2017.</p>
Data for: Combining stable isotopes, trace elements, and distribution models to assess the geographic origins of migratory bats
<p>The expansion of industrial-scale wind-energy facilities has increased the production of low-carbon emission energy but has also resulted in mortality of wildlife, including migratory bats. Management decisions can be limited by a lack of understanding of the geographic impact of bats killed at wind-energy facilities. Several studies have leveraged stable hydrogen isotope ratios (δ<sup>2</sup>H) of bat fur to illuminate this issue but are limited in the precision of conclusion because δ<sup>2</sup>H values vary primarily across latitudinal and elevational bands. One approach to increase the precision of geographic assignment is to combine independent inferences about spatial location from additional biomarkers and other related information. To test this possibility, we assigned known-origin individuals of three bat species commonly killed at on-shore wind-energy facilities in North America (<em>Lasiurus</em> <em>borealis</em>, <em>L</em>. <em>cinereus</em>, and <em>Lasionycteris</em> <em>noctivagans</em>) to probable origin using δ<sup>2</sup>H values, trace element concentrations, and species distribution models. We used cross-validation calibrated combined model tuning to determine the degree to which assignment probabilities improved when combining datasets. We found that combining markers typically performed better than single approaches. For <em>L. borealis</em> and <em>L. cinereus</em>, combining all three data sources outperformed any single or other combined approach. With an accuracy set at 80%, an average of 39.7% and 36.0% of each species' total geographic range was considered a potential origin, respectively; stable hydrogen alone included 51.8% and 50.6% of the total geographic area. In contrast, for <em>L. noctivagans</em>, including trace elements did not increase precision, and adding distribution data to δ<sup>2</sup>H values only improved precision by 0.6%. Thus, we found that a combination of multiple biomarkers typically, but not always, outperforms single marker approaches, and optimized combinations of different markers outperform equal weighting of each marker. From a practical perspective, δ<sup>2</sup>H values performed better than trace elements alone; in cases where cost is a limiting factor, the stable hydrogen should be the single biomarker used in conjunction with species distribution models. Overall, these results highlight the importance of validating methods for each species they are applied to and show that combining information from intrinsic biomarker approaches is a useful tool to document bat movements.</p>
Dataset for Book Chapter Trace Elements and their Isotopes in Streams and Rivers
<p>Dataset for Chapter Trace Elements and their Isotopes in Streams and Rivers. A dataset listing all trace element concentrations used for figures in the Chapter. The occurrence and speciation of trace elements in streams and rivers are controlled by interconnected hydrogeological, biogeochemical, and anthropogenic factors that include rock weathering, climate, vegetation, and land use within the watershed. The purpose of this chapter is to provide a broad overview of trace element abundance, speciation, and mobility in streams and rivers. We also discuss how trace elements are mobilized into stream networks and transformed during transport. Select isotopic systems are reviewed in order to provide examples of how isotopic analyses can be used to understand geochemical and anthropogenic processes. The occurrence and speciation of trace elements in streams and rivers are controlled by interconnected hydrogeological, biogeochemical, and anthropogenic factors that include rock weathering, climate, vegetation, and land use within the watershed. The purpose of this chapter is to provide a broad overview of trace element abundance, speciation, and mobility in streams and rivers. We also discuss how trace elements are mobilized into stream networks and transformed during transport. Select isotopic systems are reviewed in order to provide examples of how isotopic analyses can be used to understand geochemical and anthropogenic processes.</p>
Supplemental information data from: "Alkali Trace Elements Observed by MarSCoDe LIBS at Zhurong Landing Area on Mars: Quantitative Analysis and Its Geological Implications"
<p>This dataset includes the normalized peak areas of MarSCoDe scietific targets used in Table 3 of the corresponding article. The specific peaks are listed below.</p> <p>Data Set S1: Li 670.97 nm, Fe 260.04 nm, Al 309.37 nm, Ca 318.03 nm, Mg 518.15 nm, K 766.70 nm, and Na 818.55/819.70 nm.</p> <p>Data Set S2: Sr 421.67 nm, Fe 260.04 nm, Al 309.37 nm, Ca 318.03 nm, Mg 518.15 nm, K 766.70 nm, and Na 818.55/819.70 nm.</p> <p>Data Set S3: S 564 nm, Fe 260.04 nm, Al 309.37 nm, Ca 612.39 nm, Mg 448.24 nm, K 766.70 nm, and Na 589.16/589.76 nm.</p>
Trace Elements and Heavy Metals at PPROM
ClinicalTrials.gov study NCT04077944. IPD Sharing: UNDECIDED. Countries: 1. Publications: 3.
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Allen Brain Atlas
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DANDI Archive for NWB datasets
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International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.